taglib-wasm/dist/src/web-utils/canvas.js

TagLib-Wasm is the universal tagging library for TypeScript/JavaScript platforms: Browsers, Node.js, Deno, Bun, Cloudflare Workers, and Electron apps

import { applyPictures } from "../simple/index.js";
import { dataURLToPicture } from "./data-url.js";
async function setCoverArtFromCanvas(file, canvas, options = {}) {
  const {
    format = "image/jpeg",
    quality = 0.92,
    type = "FrontCover",
    description = "Front Cover"
  } = options;
  const dataURL = canvas.toDataURL(format, quality);
  const picture = dataURLToPicture(dataURL, type, description);
  return applyPictures(file, [picture]);
}
async function canvasToPicture(canvas, options = {}) {
  const {
    format = "image/jpeg",
    quality = 0.92,
    type = "FrontCover",
    description
  } = options;
  return new Promise((resolve, reject) => {
    canvas.toBlob(
      (blob) => {
        if (!blob) {
          reject(new Error("Failed to convert canvas to blob"));
          return;
        }
        blob.arrayBuffer().then(
          (arrayBuffer) => {
            const data = new Uint8Array(arrayBuffer);
            resolve({ mimeType: format, data, type, description });
          },
          reject
        );
      },
      format,
      quality
    );
  });
}
async function imageFileToPicture(file, type = "FrontCover", description) {
  const arrayBuffer = await file.arrayBuffer();
  const data = new Uint8Array(arrayBuffer);
  return {
    mimeType: file.type,
    data,
    type,
    description: description ?? file.name
  };
}
export {
  canvasToPicture,
  imageFileToPicture,
  setCoverArtFromCanvas
};